export default  {
	"title": '计算机网络技术_在线1',
	"testId": '51549',
	"praxiseList": [
		{
			"id": 62621,
			"title": "接入层LAN交换机使用OSI模型的哪一层作出转发决定？",
			"options": "[\"第一层\",\"第二层\",\"第三层\",\"第四层\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62622,
			"title": "一个“可以互操作”的设备是( )的设备。",
			"options": "[\"基于相同的标准\",\"来自相同的厂商\",\"使用相同的操作系统\",\"很方便地重新配置\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62623,
			"title": "哪一层是网际网络的高速主干，可连接到Internet 资源？",
			"options": "[\"广播层\",\"接入层\",\"分布层\",\"核心层\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62624,
			"title": "哪一层先汇聚接入层交换机发送的数据，再将其传输到核心层，最后发送到最终目的地？",
			"options": "[\"广播层\",\"接入层\",\"分布层\",\"核心层\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62625,
			"title": "数据包到达目的地之前必须穿过的设备数量是指什么？",
			"options": "[\"带宽聚合\",\"网络直径\",\"冗余链路\",\"融合网路\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62626,
			"title": "允许交换机通过现有的以太网电缆对设备供电的方式叫做",
			"options": "[\"以太网\",\"供电\",\"POE\",\"QoS\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62627,
			"title": "广域网互联设备有哪些？",
			"options": "[\"中继器\",\"交换机\",\"网桥\",\"路由器\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62628,
			"title": "网桥工作在OSI参考模型的哪一层？",
			"options": "[\"物理层\",\"网络层\",\"数据链路层\",\"会话层\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62629,
			"title": "要将接受的报文交付到主机上正确的应用程序，必须使用( )地址。",
			"options": "[\"端口\",\"IP\",\"物理\",\"以上都不对\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62630,
			"title": "下面哪种说法是错误的？",
			"options": "[\"中继器可以连接一个以太网UTP线缆上的设备和一个在以太网同轴电缆上的设备\",\"中继器可以增加网络的带宽\",\"中继器可以扩展网络上两个节点之间的距离\",\"中继器能够再生网络上的电信号\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62631,
			"title": "交换机工作在OSI参考模型的哪一层？",
			"options": "[\"物理层\",\"网络层\",\"数据链路层\",\"会话层\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62632,
			"title": "物理层的任务是在通信系统间完成( )的传输。",
			"options": "[\"比特\",\"帧\",\"分组\",\"报文段\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62633,
			"title": "基于端口的VLAN 划分其优点是",
			"options": "[\"配置简单\",\"随意改变网络设备的位置\",\"容易管理\",\"需要查看数据包的三层报文头\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62634,
			"title": "交换机端口F0/1被手动配置为中继端口，现在拟用于一台主机连接到网络，网络管理员应该怎样重新配置交换机端口F0/1？",
			"options": "[\"禁用DTP\",\"删除当前通过端口F0\\/1中继的所有VLAN\",\"关闭该端口，然后重新启用，使其恢复默认配置\",\"在端口模式输入switchpotrt mode assces命令\"]",
			"answer": "4",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62635,
			"title": "在通过路由器实现VLAN间通信的方案中，各VLAN内计算机用户的网关指的是",
			"options": "[\"路由器物理接口的IP\",\"计算机自身所连接的交换机以太网接口的IP\",\"路由器子接口的IP地址\",\"交换机的VLAN1的管理IP\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62636,
			"title": "网络管理员发现创建的子接口F0/1.10配置错误，想删除该接口，请问一下命令正确的是?",
			"options": "[\"在全局配置模式下输入no interface f0\\/1.10\",\"在物理接口配置模式下输入no interface f0\\/1.10命令\",\"在子接口模式下配置模式下输入no interface f0\\/1.10命令\",\"在子接口模式下配置模式下输入no shutdown\"]",
			"answer": "1",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62637,
			"title": "一个三层交换机收到数据包后首先进行的操作是",
			"options": "[\"发送ARP请求\",\"上送CPU请求查找路由表获得下一跳地址\",\"根据数据报文中的目的MAC地址查找MAC地址表\",\"用自己的MAC地址替换数据报文的目的MAC地址\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62638,
			"title": "有关处理生成树协议中链路故障的说法，下面哪个是正确的",
			"options": "[\"链路失去连通性对用户来说就是无法正常通讯，所以对生成树协议来说，其首要目的是防止链路失去连通性。也就是说临时回路是可以让其发生，但绝对不能让链路失去连通性的情况存在\",\"由于链路故障在网络中传播有一定的延迟，所以为了防止临时回路的产生，生成树协议引入了一个中间状态即listening状态\",\"为了防止临时回路的产生，生成树协议在将端口由阻塞状态迁移到转发状态时，需要一定的时间延迟\",\"生成树协议能够避免链路临时失去连通性\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62639,
			"title": "交换机互联中的环路问题是用什么技术来解决的",
			"options": "[\"VLAN\",\"STP\",\"VTP\",\"RIP\"]",
			"answer": "2",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62640,
			"title": "以太网交换机组网中有环路出现也能正常工作，则是由于运行了( )协议。",
			"options": "[\"801.z\",\"802.3\",\"STP\",\"Trunk\"]",
			"answer": "3",
			"type": "single",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62641,
			"title": "分布层交换机需要有哪些功能？",
			"options": "[\"千兆以太网\\/万兆以太网\",\"高转发速率\",\"第3层转发\",\"安全策略／访问控制列表\"]",
			"answer": "[1,2,3,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62642,
			"title": "核心层交换机需要有哪些功能？",
			"options": "[\"带宽聚合\",\"第3层支持\",\"冗余组件\",\"以太网供电\"]",
			"answer": "[1,2,3]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62643,
			"title": "分布层交换机需要有哪些功能？",
			"options": "[\"带宽聚合\",\"第3层支持\",\"端口安全\",\"以太网供电\"]",
			"answer": "[1,2]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62644,
			"title": "网络互联主要有几种类型？",
			"options": "[\"LAN与LAN互联\",\"LAN与WAN互联\",\"WAN与WAN互联\",\"LAN通过WAN与其他LAN互联\"]",
			"answer": "[1,2,3,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62645,
			"title": "局域网互联设备有哪些？",
			"options": "[\"中继器\",\"交换机\",\"网桥\",\"路由器\"]",
			"answer": "[1,2,3]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62646,
			"title": "下列关于VLAN的描述中，正确选项为",
			"options": "[\"一个VLAN形成一个小的广播域，同一个VLAN成员都在由所属VLAN确定的广播域内\",\"VLAN技术被引入到网络解决方案中来，用于解决大型的二层网络面临的问题\",\"VLAN的划分必须基于用户地理位置，受物理设备的限制\",\"VLAN在网络中的应用增强了通讯的安全性\"]",
			"answer": "[1,2,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62647,
			"title": "以下哪种VLAN类型可随意改变网络设备的位置？",
			"options": "[\"基于端口的VLAN\",\"基于MAC的VLAN\",\"基于IP的VLAN\",\"基于协议的VLAN\"]",
			"answer": "[2,3,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62648,
			"title": "下列关于命令配置模式的叙述正确的为",
			"options": "[\"添加VLAN的配置命令模式为全局配置模式\",\"设置端口native vlan的配置命令模式为以太网接口配置模式\",\"设置相应的端口链路为Trunk链路的配置命令模式为以太网接口模式\",\"向VLAN中增加端口的配置命令模式是全局模式\"]",
			"answer": "[1,2,3]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62649,
			"title": "实现VLAN间通信的方式有以下哪几种？",
			"options": "[\"Trunk链路\",\"物理链路\",\"单臂路由\",\"三层交换\"]",
			"answer": "[2,3,4]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62650,
			"title": "关于VLAN下面说法正确的是",
			"options": "[\"隔离广播域\",\"相互间通信要通过三层设备\",\"可以限制网上的计算机互相访问的权限\",\"只能在同一交换机上的主机进行逻辑分组\"]",
			"answer": "[1,2]",
			"type": "muti",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": "[]"
		},
		{
			"id": 62651,
			"title": "运输层提供的端到端的透明数据运输服务，使高层用户不必关心通信子网的存在，由此用统一的运输原语书写的高层软件便可运行于任何通信子网上。",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62652,
			"title": "资源子网由各种通信控制处理机.通信线路与其他通信设备组成，负责全网的通信处理任务",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62653,
			"title": "计算机网络系统由通信子网和信息子网组成两大类",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62654,
			"title": "计算机网络分为双绞线、同轴电缆、光纤、无线其划分依据是网络的通信",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62655,
			"title": "计算机网络中负责完成节点间通信任务的通信子网称为公用数据网",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62656,
			"title": "表示层是开放系统互连环境的最高层。",
			"options": "",
			"answer": "-1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62657,
			"title": "网络管理的目的协调、保持网络系统的高效、可靠运行，当网络出现故障时，能及时报告和处理",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
		},
		{
			"id": 62658,
			"title": "网络拓扑是指网络形状，或者是它在物理上的连通性。网络的拓扑结构主要有：星形拓扑、总线拓扑、环形拓扑、树形拓扑、混合拓扑及网形拓扑",
			"options": "",
			"answer": "1",
			"type": "charge",
			"hard": 1,
			"explain": "无",
			"regtime": "2021-02-25 14:08:49",
			"last_time": null,
			"iscorrect": 0,
			"user_answer": ""
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